Well actually no they're not, not filibustering anyway. Not for a few decades yet.
A great panic though - I wonder how the blazes it got started?
As theorised in this article, the whole thing turned out to be a canard.
The only thing I have to say about canards, is to be very careful about how you pronounce the word in France. I don't know why, but I've seen one or two Parisian waiters blush when the word was attempted by a pretty foreign female, and they won't reveal what they think they heard.
Source: Freeman's Journal and Daily Commercial Advertiser (Dublin, Ireland). 16 May 1871